private static MimeEntity GetPart(Message message, string id)
{
MessageEntitySummary part = message.Parts.Flatten(p => p.ChildParts).FirstOrDefault(p => p.Id == id);
if (part == null)
{
throw new FileNotFoundException($"Part with id '{id}' in message {message.Id} is not found");
}
return(part.MimeEntity);
}
private MessageEntitySummary HandleMimeEntity(MimeEntity entity)
{
int index = 0;
return(MimeEntityVisitor.VisitWithResults <MessageEntitySummary>(entity, (e, p) =>
{
MessageEntitySummary result = new MessageEntitySummary()
{
MessageId = Id,
Id = index.ToString(),
ContentId = e.ContentId,
Name = e.ContentId + " - " + e.ContentType.MimeType,
Headers = e.Headers.Select(h => new Header {
Name = h.Field, Value = h.Value
}).ToList(),
ChildParts = new List <MessageEntitySummary>(),
Attachments = new List <AttachmentSummary>(),
Size = e.ToString().Length,
MimeEntity = e
};
if (p != null)
{
p.ChildParts.Add(result);
if (e.IsAttachment)
{
p.Attachments.Add(new AttachmentSummary()
{
Id = result.Id,
ContentId = result.ContentId,
FileName = string.IsNullOrEmpty(e.ContentType?.Name)
? e.ContentDisposition?.FileName
: e.ContentType.Name,
Url = $"/api/messages/{Id}/part/{result.Id}/content"
});
}
}
index++;
return result;
}));
}
private MessageEntitySummary HandleMimeEntity(MimeEntity entity)
{
int index = 0;
return(MimeEntityVisitor.Visit <MessageEntitySummary>(entity, null, (e, p) =>
{
string cid = e.ContentId ?? index.ToString();
MessageEntitySummary result = new MessageEntitySummary()
{
MessageId = Id,
ContentId = cid,
Name = e.ContentId + " - " + e.ContentType.MimeType,
Headers = e.Headers.Select(h => new Header {
Name = h.Field, Value = h.Value
}).ToList(),
ChildParts = new List <MessageEntitySummary>(),
Attachments = new List <AttachmentSummary>()
};
if (p != null)
{
p.ChildParts.Add(result);
if (e.IsAttachment)
{
p.Attachments.Add(new AttachmentSummary()
{
ContentId = result.ContentId,
FileName = e.ContentDisposition?.FileName,
Url = $"/api/messages/{Id}/part/{result.ContentId}/content"
});
}
}
index++;
return result;
}));
}
private MessageEntitySummary HandleMimeEntity(MimeEntity entity)
{
MessageEntitySummary result = new MessageEntitySummary()
{
Name = entity.ContentId + " - " + entity.ContentType.MimeType,
Headers = entity.Headers.Select(h => new Header {
Name = h.Field, Value = h.Value
}).ToList(),
ChildParts = new List <MessageEntitySummary>(),
Source = entity.ToString()
};
using (MemoryStream memoryStream = new MemoryStream())
{
entity.WriteTo(memoryStream, true);
result.Body = Encoding.UTF8.GetString(memoryStream.ToArray());
}
if (entity is Multipart multipart)
{
foreach (MimeEntity childEntity in multipart)
{
result.ChildParts.Add(HandleMimeEntity(childEntity));
}
}
else if (entity is MimeKit.MessagePart rfc822)
{
result.Html = rfc822.Message.HtmlBody;
result.ChildParts.Add(HandleMimeEntity(rfc822.Message.Body));
}
else
{
var part = (MimePart)entity;
}
return(result);
}
private MessageEntitySummary HandleMimeEntity(MimeEntity entity)
{
int index = 0;
return(MimeEntityVisitor.VisitWithResults <MessageEntitySummary>(entity, (e, p) =>
{
string fileName = PunyCodeReplacer.DecodePunycode(!string.IsNullOrEmpty(e.ContentDisposition?.FileName)
? e.ContentDisposition?.FileName
: e.ContentType?.Name);
MessageEntitySummary result = new MessageEntitySummary()
{
MessageId = Id,
Id = index.ToString(),
ContentId = e.ContentId,
Name = (fileName ?? e.ContentId ?? index.ToString()) + " - " + e.ContentType.MimeType,
Headers = e.Headers.Select(h => new Header {
Name = h.Field, Value = PunyCodeReplacer.DecodePunycode(h.Value)
}).ToList(),
ChildParts = new List <MessageEntitySummary>(),
Attachments = new List <AttachmentSummary>(),
Warnings = new List <MessageWarning>(),
Size = e.ToString().Length,
IsAttachment = (e.ContentDisposition?.Disposition != "inline" && !string.IsNullOrEmpty(fileName)) || e.ContentDisposition?.Disposition == "attachment",
MimeEntity = e
};
if (p != null)
{
p.ChildParts.Add(result);
if (result.IsAttachment)
{
if (e.ContentDisposition?.Disposition != "attachment")
{
result.Warnings.Add(new MessageWarning {
Details = $"Attachment '{fileName}' should have \"Content-Disposition: attachment\" header."
});
}
if (string.IsNullOrEmpty(fileName))
{
result.Warnings.Add(new MessageWarning {
Details = $"Attachment with content ID '{e.ContentId}' should have filename specified in either 'Content-Type' or 'Content-Disposition' header."
});
}
p.Attachments.Add(new AttachmentSummary()
{
Id = result.Id,
ContentId = result.ContentId,
FileName = fileName,
Url = $"api/messages/{Id}/part/{result.Id}/content"
});
}
}
index++;
return result;
}));
}